@article{32144,
      author = {Aul, George N.},
      url = {http://library.usi.edu/record/32144},
      title = {Grouting horizontal drainage holes in coalbeds /},
      publisher = {Dept. of the Interior, Bureau of Mines,},
      recid = {32144},
      pages = {16 p. :},
      address = {[Washington] ;},
      year = {1979},
}